KROHNE BW 25 Ex II 1-2 G EN - Manual (Page 18)

6
SERVICE
18
BW25
www.krohne.com 03/2010 - 4000862901 MA BW25-Ex-II1/2G-AD R01 en
Service
6.1 Maintenance
Indicator M9 Indicator M9 Indicator M9 Indicator M9
The indicator requires no maintenance under normal operating conditions and when used as
prescribed.
Within the scope of checks required to be carried out in hazardous areas to maintain systems in
proper working order, the following visual inspections should be carried out at regular intervals:
• Inspect the housing, cable entries and incoming cables for signs of corrosion or damage.
Indicator M10 Indicator M10 Indicator M10 Indicator M10
The converter requires no maintenance under normal operating conditions and when used as
prescribed.
The device must be electrically isolated if it becomes necessary to open the flameproof
electronics compartment in the presence of an explosive atmosphere. For temperature classes
T6 and T5, be absolutely sure to wait until the time shown on the converter nameplate has
elapsed before opening the flameproof enclosure (8 minutes).
Before connecting or disconnecting the electrical connection cables of the device, make sure
that all cables leading to the converter are isolated from the ground of the hazardous area. This
also applies to protective ground (PE) and equipotential bonding conductors (PA).
Re-grease the flameproof cover thread of the converter and the cover seals with a suitable
resin-free grease after doing any maintenance work.
Within the scope of checks required to be carried out in hazardous areas to maintain systems
in proper working order, the following visual inspections should be carried out at regular
intervals:
• Inspect the housing, cable entries and incoming cables for signs of corrosion or damage.
AD_BW25_II1_2G_R01_en_4000862901_PRT.book Page 18 Monday, July 1, 2013 10:00 AM